The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 24, 2012
Filed:
Apr. 15, 2008
Keiji Okinaka, Kawasaki, JP;
Masataka Yashima, Tokyo, JP;
Akihito Saitoh, Yokohama, JP;
Naoki Yamada, Inagi, JP;
Keiji Okinaka, Kawasaki, JP;
Masataka Yashima, Tokyo, JP;
Akihito Saitoh, Yokohama, JP;
Naoki Yamada, Inagi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is an organic electroluminescent device for emitting blue light, which has high luminous efficiency and good drive durability. This organic electroluminescent device for emitting blue light includes an anode, a cathode, and a layer which contains an organic compound interposed between the anodeand the cathode, the layer which contains an organic compound including at least a light-emitting layer, wherein the light-emitting layercontains a bipolar host having a hole mobility and an electron mobility of 10cm/Vs or greater, a light-emitting dopant and a carrier trapping dopant, and the light-emitting dopant energy gap E, the bipolar host energy gap E, and the carrier trapping dopant energy gap Eare such that E>E>E.